package com.example.x1c.contactstest;

import android.Manifest;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.provider.ContactsContract;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    ArrayAdapter<String> adapter;

    List<String> contactList = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ListView contactsView = findViewById(R.id.contacts_view);
        adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, contactList);
        contactsView.setAdapter(adapter);
        if(ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS)
                != PackageManager.PERMISSION_GRANTED){
            // 请求授权
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_CONTACTS}, 1);
        }else{
            readContacts();
        }

    }

    private void readContacts(){
        Cursor cursor = null;
        try{
            cursor = getContentResolver().
                    query(ContactsContract.CommonDataKinds.
                            Phone.CONTENT_URI, null, null,null, null);
            if(cursor!=null){
                while(cursor.moveToNext()){
                    String displayName = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                    String number = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
                    contactList.add(displayName+"\n" + number);
                    Log.d(TAG, "readContacts: " + displayName + "," + number);

                }
                adapter.notifyDataSetChanged();
            }
        } catch (Exception e){
            e.printStackTrace();
        } finally {
            if(cursor != null ){
                cursor.close();
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode){
            case 1:
                if(grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
                    readContacts();
                }else {
                    Toast.makeText(this, "你没有权限", Toast.LENGTH_SHORT);
                }
                break;
            default:
        }
    }
}
